How Cement Mixers Work

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With this in mind, the shear rate is analyzed inside a drum of a concrete
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. The objective is to better understand the effect of transport of fresh concrete, from the ready mix plant to the building site. In this work, the shear rate is analyzed inside the drum of a concrete
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. This is done to better understand the potential effect of transport, from the ready mix plant to the building site, in terms of the concrete final rheological state. Decrease of availability of fossil fuels and environment issues, push research towards the development of high efficiency power trains for vehicles that transport people, goods and mobile operating machines, like the concrete
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considered in this paper. Conventional concrete
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use diesel engine to move the truck and a hydraulic system which keep spinning the concrete drum. A hybrid powertrain based on battery-powered electrical drives can replace the conventional hydraulic system assuring an efficiency improvement. Furthermore, thanks to the reversibility of the electrical drives, it is possible to recover kinetic energy during the braking phases of the truck. Aim of this paper is to study and develop a hybrid powertrain for the concrete mixer drum. The study is based on a full energetic model of the vehicle developed for sizing the components and designing the control strategies. A model of the conventional hydraulic
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has also been proposed in order to evaluate the benefit introduced by the proposed hybrid system. Simulation models have been validated comparing experimental data collected on a conventional
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in different operating conditions.